Modernish: a shell moderniser library

Re:Modernish: a shell moderniser library by oweiler on Tuesday February 06, 2018 @11:33AM (#16317333)

While I applaud the effort and extensive documentation I'd never use something like this in production.

For example have a look at the definition of `sfor`

    sfor 'i=1' '[ "$i" -le 10 ]' 'i=$((i+1))'; do
        print "$i"
    done

Doesn't look too bad at first, until you realize `sfor` is an alias which is defined as

    alias sfor='_Msh_sfor_init=y && while _Msh_doSfor'

So it's an alias which expands to two commands.

No have a look at the definition of `_Msh_doSfor`

    _Msh_doSfor() {
        case ${#},${_Msh_sfor_init+y} in
        ( 3, )	eval " $3" || die 'sfor: loop command failed' || return ;;
        ( 3,y )	eval " $1" || die 'sfor: init command failed' || return
                unset -v _Msh_sfor_init ;;
        ( * )	die "sfor: 3 arguments expected, got $#" || return ;;
        esac
        eval " $2" || case $? in
        ( 1 )	return 1 ;;
        ( * )	die "sfor: test command failed" ;;
        esac
    }

No thanks, I'd rather use Python.

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Re:Modernish: a shell moderniser library by yorwba on Tuesday February 06, 2018 @01:27PM (#16318219)

I think the point of this library is that all those gory details necessary for sane error handling are encapsulated, so you can build on that work if you absolutely need to write shell scripts. Otherwise, yeah, I hope that Oil will be the promised better shell and make bash & co. obsolete.

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